PIERCER

Ye Piercer doth look like unto a stalactyte, and hangeth from the roofs of caves and caverns. Unto the height of a man, and thicker than a man's thigh do they grow, and in groups do they hang. If a creature doth pass beneath them, they will by its heat and noise perceive it, and fall upon it to kill and devour it, though in any other way they move but exceeding slow.
the Bestiary of Xygag

Name: glass piercer
Difficulty: 9
Base level: 7
Base experience: 100
Speed: 1
Base AC: 0
Base MR: 0
Alignment: 0
Frequency: Very rare
Genocidable: Yes
ATTACK:
Bite: 4d6
Weight: 400
Nutritional value: 300
Size: medium
Resistances: acid
Resistances conveyed by eating: None

A glass piercer can cling to ceilings. It is able to hide itself, either by blending into the scenary, or by mimicing a dungeon feature, such as a pile of coins etc. It has an animal body. It has no eyes, and is therefore impervious to gaze and blindness attacks. A glass piercer has no limbs. It cannot pick up objects. It is a carnivore.

Name: iron piercer
Difficulty: 6
Base level: 5
Base experience: 57
Speed: 1
Base AC: 0
Base MR: 0
Alignment: 0
Frequency: Quite rare
Genocidable: Yes
ATTACK:
Bite: 3d6
Weight: 400
Nutritional value: 300
Size: medium
Resistances: None
Resistances conveyed by eating: None

An iron piercer can cling to ceilings. It is able to hide itself, either by blending into the scenary, or by mimicing a dungeon feature, such as a pile of coins etc. It has an animal body. It has no eyes, and is therefore impervious to gaze and blindness attacks. An iron piercer has no limbs. It cannot pick up objects. It is a carnivore.

Name: rock piercer
Difficulty: 4
Base level: 3
Base experience: 28
Speed: 1
Base AC: 3
Base MR: 0
Alignment: 0
Frequency: Uncommon
Genocidable: Yes
ATTACK:
Bite: 2d6
Weight: 200
Nutritional value: 200
Size: small
Resistances: None
Resistances conveyed by eating: None

A rock piercer can cling to ceilings. It is able to hide itself, either by blending into the scenary, or by mimicing a dungeon feature, such as a pile of coins etc. It has an animal body. It has no eyes, and is therefore impervious to gaze and blindness attacks. A rock piercer has no limbs. It cannot pick up objects. It is a carnivore.